Chemical transport

Xem 1-20 trên 122 kết quả Chemical transport
  • Estimating the transport and fate of chemicals released into the environment is an interesting and challenging task. The global environment is large on the chemical transport and fate scale. This text applies the mathematics of diffusion, turbulent diffusion, and dispersion to the atmosphere, lakes, rivers, groundwater, and oceans, as well as transport between these media. The book follows a new educational paradigm of textbooks, in that it is based on examples and case studies.

    pdf295p nhulan0908 29-09-2012 45 20   Download

  • This book is intended as a guide to the selection or design of the principal kinds of chemical process equipment by engineers in school and industry. The level of treatment assumes an elementary knowledge of unit operations and transport phenomena. Access to the many design and reference books listed in Chapter 1 is desirable. For coherence, brief reviews of pertinent theory are provided. Emphasis is placed on shortcuts, rules of thumb, and data for design by analogy, often as primary design processes but also for quick evaluations of detailed work....

    pdf820p tuananhhumg 13-10-2012 102 32   Download

  • This book is intended as a guide to the selection or design of the principal kinds of chemical process equipment by engineers in school and industry. The level of treatment assumes an elementary knowledge of unit operations and transport phenomena.

    pdf782p phibe1210 13-09-2014 33 16   Download

  • The Workshop on Energy and Transportation took place on January 7-9, 2002, in Washington, DC. This workshop was the second in a series of workshops that comprise the study Challenges in the Chemical Sciences in the 21st Century. The purpose of this study was to carry out a survey of the current status of the chemical sciences, including chemistry and chemical engineering, and its interfaces with other disciplines such as mechanical engineering, physics, materials science, and the biological sciences.

    pdf127p tom_123 14-11-2012 33 11   Download

  • Cerium, an element in the lanthanide series, has a number of radioactive isotopes. Several of these are produced in abundance in nuclear fission reactions associated with nuclear industry operations or detonation of nuclear devices. This report summarizes our present knowledge of the relevant physical, chemical, and biological properties of radiocerium as a basis for establishing radiation protection guidelines.

    pdf119p camchuong_1 04-12-2012 20 6   Download

  • Việc sử dụng những mối tương quan trong việc xác định sự truyền động lượng, truyền năng lượng và truyền khối từ pha này sang pha khác dưới những điều kiện trạng thái ổn định đã được trình bày trong chương 4. Mặc dù một vài ví dụ trong chương 4 sử dụng sự bảo toàn vĩ mô, việc giải quyết có hệ thống của những cân bằng này cho sự bảo toàn chemical species, khối lượng và năng lượng không được trình bày.

    pdf19p nobita_12 14-11-2013 19 4   Download

  • January 2012 saw the completion of the U.S. Army’s Chemical Materials Agency’s (CMA’s) task to destroy 90 percent of the nation’s stockpile of chemical weapons. CMA completed destruction of the chemical agents and associated munitions stored at six of eight continental U.S. storage facilities as well as chemical weapons deployed overseas, which were transported to Johnston Atoll, southwest of Hawaii, and demilitarized there. The remaining 10 percent of the nation’s chemical weapons stockpile is stored at two remaining continental U.S.

    pdf193p xunu1311 02-11-2012 17 3   Download

  • Things only move when they are forced to move! A bicycle only moves when a force is applied in the form of pedaling. A cloud on the sky only moves when a force is applied in the form of a storm or a wind. A soccer ball only flies into the goal net when a force in the form of a beautiful and precise shot from Peter Møller or another great soccer player is applied. Thus all sorts of transport only take place when a force, called a driving force, is applied. This is also the case when we are talking about transport of other...

    pdf19p tuanloc_do 04-12-2012 19 3   Download

  • Methanosarcina mazeiis a methanogenic archaeon that is able to thrive on various substrates and therefore contains a variety of redox-active proteins involved in both cytoplasmic and membrane-bound electron transport. The organism possesses a complex branched respiratory chain that has the abil-ity to utilize different electron donors.

    pdf11p cosis54 05-01-2013 16 2   Download

  • The genome ofEscherichia colicontains four genes assigned to the peptide transporter (PTR) family. Of these, only tppB (ydgR) has been character-ized, and named tripeptide permease, whereas protein functions encoded by the yhiP, ybgHandyjdLgenes have remained unknown.

    pdf9p galaxyss3 07-03-2013 8 2   Download

  • Secondary transmembrane transport carriers fall into families and super-families allowing prediction of structure and function. Here we describe hundreds of sequenced homologues that belong to six families within a novel superfamily, the bile⁄arsenite⁄riboflavin transporter (BART) super-family, of transport systems and putative signalling proteins.

    pdf18p galaxyss3 21-03-2013 11 2   Download

  • The divalent metal transporter (DMT1) is a 12-transmem-brane domain protein responsible for dietary iron uptake in the duodenum and iron acquisition from transferrin in peripheral tissues. The transmembrane domain 4 (TM4) of DMT1 has been shown to be crucial for its biological function. Here we report the 3D structure and topology of the DMT1-TM4 peptide by NMR spectroscopy with simulated annealing calculations in membrane-mimetic environments, e.g. 2,2,2-trifluoroethanol and SDS micelles.

    pdf14p dell39 03-04-2013 12 2   Download

  • The interaction of the antibacterial phosphonodipeptide alafosfalinwithmammalianH + /peptide cotransporters was studied in Caco-2 cells, expressing the low-affinity intestinal type peptide transporter 1 (PEPT1), and SKPT cells, expressing the high-affinity renal type peptide transporter 2 (PEPT2). Alafosfalin strongly inhibited the uptake of [ 14 C]glycylsarcosine withKi values of 0.19 ± 0.01 mMand 0.07 ± 0.01 mMfor PEPT1 and PEPT2, respectively.

    pdf6p dell39 03-04-2013 7 2   Download

  • In an effort to shed more light on the early evolutionary history of the heavy-chain subunits of heteromeric amino acid transporters (hcHATs) rBAT and 4F2hc within the a-amylase family GH13, a bioinformatics study was undertaken.

    pdf14p vinaphone15 27-02-2013 12 1   Download

  • Mammalian glycerol uptake⁄transporter 1 (Gup1), a homolog of Saccharo-myces cerevisiaeGup1, is predicted to be a member of the membrane-boundO-acyltransferase family and is highly homologous to mammalian hedgehog acyltransferase, known as Skn, the homolog of the Drosoph-ila skinny hedgehog gene product.

    pdf14p media19 05-03-2013 10 1   Download

  • During adipocyte differentiation, there is an underlying complex series of gene expressions. We have previously isolated many genes whose expres-sion levels are quickly elevated by the addition of inducers to mouse 3T3-L1 preadipocyte cells. Here we report the isolation and characterization of SLC39A14, a member of the LZT proteins, one of the subfamilies of ZIP transporters.

    pdf0p awards 06-04-2013 9 1   Download

  • Cystinosis is a lysosomal storage disease caused by an accumulation of insoluble cystine in the lumen of the lysosome. CTNSencodes the lyso-somal cystine transporter, mutations in which manifest as a range of disorders and are the most common cause of inherited renal Fanconi syndrome. Cystinosin, theCTNSproduct, is highly conserved among mam-mals.

    pdf15p awards 06-04-2013 10 1   Download

  • The mammalian members of the inorganic phosphate (Pi ) transporter (PiT) family, the type III sodium-dependent phosphate (NaP i) transporters PiT1 and PiT2, have been assigned housekeeping Pi transport functions and are suggested to be involved in chondroblastic and osteoblastic mineralization and ectopic calcification.

    pdf15p fptmusic 11-04-2013 10 1   Download

  • Assembly of the components of the thylakoidDpH-dependent/Tat protein transport machinery was analyzed in vitro. Upon incubation with intact chloroplasts, precur-sors to all three components, Hcf106, cpTatC and Tha4, were imported into the organelle and assembled into char-acteristic endogenous complexes. In particular, all of the imported cpTatC and approximately two-thirds of the imported Hcf106functionally assembled into 700 kDa complexes capable of binding Tat pathway precursor pro-teins.

    pdf12p fptmusic 12-04-2013 14 1   Download

  • A cDNA was cloned from the cabbage looperTricho-plusia ni based on similarity to other cloned dopamine transporters (DATs). The total nucleotide sequence is 3.8kb in length and contains an open reading frame for a protein of 612 amino acids. The predicted moth DAT protein (TrnDAT) has greatest amino acid sequence identity with Drosophila melanogasterDAT (73%) andCaenorhabdi-tis elegans DAT (51%). TrnDAT shares only 45% amino acid sequence identity with an octopamine transporter (TrnOAT) cloned recently from this moth. ...

    pdf11p tumor12 20-04-2013 10 1   Download

Đồng bộ tài khoản